20-21

East Face of Arden Peak (Peak 10,201)

Date
Activity
Snowboarding

Two large natural avalanches in Maid of the Mist Basin. One of them ran on the east face of Arden Peak (Peak 10,201) which propagated across the entire face. Could have been triggered by a cornice fall then stepped down to deeper layers. The second was on the NE face of the peak Fat Maid and Skinny Maid come from. Also propagated across the entire slope. Crown height between 6'-8' in most places.

Region
Northern Gallatin
Location (from list)
Maid of the Mist
Observer Name
Two Large Natural Avalanches

NE face of Sheep Mountain above Round Lake.

Date
Activity
Snowmobiling

Small slab avalanche with snowmobile highmark tracks. They do not appear to be related, since there are no tracks into or out of the slide.

Approximate coordinates 45 4.313 x 109 55.380

Region
Cooke City
Location (from list)
Sheep Mountain
Observer Name
Roy Taylor

GNFAC Avalanche Forecast for Sat Mar 6, 2021

Snowpack and Avalanche Discussion

<p>Wet snow and deeply buried weak layers are the two primary concerns today.&nbsp;</p>

<p>Yesterday, we got several reports of small slab avalanches breaking on low elevation sunny slopes, both skier triggered and breaking naturally (<a href="https://www.mtavalanche.com/images/21/gallatin-canyon-wet-slide"><stron…;, <a href="https://www.mtavalanche.com/images/21/specimen-creek-avalanche"><strong…;). While these slides weren’t very large, they indicate that the potential exists for larger slides. Watch out for wet snow as the day warms up and crusts break down. Particularly watch for sunny low elevation slopes that are sheltered from the cooling effects of today’s strong winds. If it ends up raining more than a light drizzle this afternoon, just avoid all steep slopes. Rain is an abrupt change that can quickly make slopes unstable, particularly when it’s falling onto a previously dry snowpack. If you find more than a couple inches of wet snow, move to shadier slopes or head home.&nbsp;</p>

<p>The weak snow near the ground that we’ve been warning you about all year is still down there and it is still worrisome. The consequences of triggering a slide remain high and require continued vigilance. Don’t let yourself be lured into a false sense of security because the frequency of slides is going down. It remains possible to trigger large, dangerous avalanches on these weak layers.&nbsp;</p>

<p>The avalanche danger is MODERATE.</p>

<p>&nbsp;</p>

<p>Large avalanches are unlikely in the mountains around Cooke City. However, that doesn’t mean you can turn off your avalanche brain. Be on the lookout for wet snow on sunny slopes as the day warms up and check to make sure you aren’t on a slope that has the isolated weak layers at the ground before committing to steep terrain. The recent avalanche that broke 3-4 ft deep on weak layers at the ground in Yellowstone National Park, outside our advisory area, is a good reminder to stay on your toes (<a href="https://www.mtavalanche.com/node/24530"><strong><u>details</u></strong>…;). The avalanche danger is LOW in the mountains near Cooke City.&nbsp;</p>

<p>If you get out, please send us your observations no matter how brief. You can submit them via our <a href="https://www.mtavalanche.com/node/add/snow_observation"><strong><u>websi…;, email (<a href="mailto:mtavalanche@gmail.com"><strong><u>mtavalanche@gmail.com</u></str…;), phone (406-587-6984), or Instagram (#gnfacobs).</p>

The Beacon Park at Beall Park in Bozeman is running!

The Friends of the Avalanche Center in partnership with the City of Bozeman put in a Beacon Park at Beall Park. It is located on the north side of the Beall building between N. Bozeman Ave. and the ice rink. Stop by with your

Small Avalanche in Specimen Creek

Specimen Creek
Southern Gallatin
Code
SS-N-R1-D1
Elevation
7800
Aspect
SE
Latitude
45.02650
Longitude
-111.04800
Notes

From obs: "Small D1 avalanche on south-eastern aspect around 7800ft."

Number of slides
1
Number caught
0
Number buried
0
Avalanche Type
Soft slab avalanche
Trigger
Natural trigger
R size
1
D size
1
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Single Avalanche
Advisory Year

Small Skier Triggered Slide in Gallatin Canyon

Dudley Creek
Northern Madison
Code
WS-AS-R1-D1
Elevation
7200
Aspect
E
Latitude
45.31450
Longitude
-111.29500
Notes

From obs: "While touring above the canyon this morning, I noticed a very recent wet slide (would guess this incident occurred yesterday afternoon, March 4th). This was a skier triggered slide on a E aspect at an elevation of 7200. This slide was roughly 50 feet wide and ran about 50 feet, I estimated this crown to be 2-3 feet deep, slid all the way to the ground. This occurred below a steep roller."

Number of slides
1
Number caught
0
Number buried
0
Avalanche Type
Wet slab avalanche
Trigger
Skier
R size
1
D size
1
Problem Type
Wet Snow
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Single Avalanche
Advisory Year

From obs: "While touring above the canyon this morning, I noticed a very recent wet slide (would guess this incident occurred yesterday afternoon, March 4th). This was a skier triggered slide on a E aspect at an elevation of 7200. This slide was roughly 50 feet wide and ran about 50 feet, I estimated this crown to be 2-3 feet deep, slid all the way to the ground. This occurred below a steep roller."

Photo: T. Saulnier

Northern Madison, 2021-03-06